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ACPI: create notifier chain to get hotkey events to graphics driver 

Kernel mode graphics drivers need this ACPI notifier chaine
so that they can get notified upon hotkey events.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
wifi-calibration
Zhang Rui 2008-01-25 14:48:06 +08:00 committed by Len Brown
parent ba5e122342
commit 9ee85241fd
2 changed files with 31 additions and 0 deletions
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28
drivers/acpi/event.c
View File

@ -109,6 +109,34 @@ static const struct file_operations acpi_system_event_ops = {
};
#endif /* CONFIG_ACPI_PROC_EVENT */
/* ACPI notifier chain */
BLOCKING_NOTIFIER_HEAD(acpi_chain_head);
int acpi_notifier_call_chain(struct acpi_device *dev, u32 type, u32 data)
{
struct acpi_bus_event event;
strcpy(event.device_class, dev->pnp.device_class);
strcpy(event.bus_id, dev->pnp.bus_id);
event.type = type;
event.data = data;
return (blocking_notifier_call_chain(&acpi_chain_head, 0, (void *)&event)
== NOTIFY_BAD) ? -EINVAL : 0;
}
EXPORT_SYMBOL(acpi_notifier_call_chain);
int register_acpi_notifier(struct notifier_block *nb)
{
return blocking_notifier_chain_register(&acpi_chain_head, nb);
}
EXPORT_SYMBOL(register_acpi_notifier);
int unregister_acpi_notifier(struct notifier_block *nb)
{
return blocking_notifier_chain_unregister(&acpi_chain_head, nb);
}
EXPORT_SYMBOL(unregister_acpi_notifier);
#ifdef CONFIG_NET
static unsigned int acpi_event_seqnum;
struct acpi_genl_event {

3
include/acpi/acpi_bus.h
View File

@ -321,6 +321,9 @@ struct acpi_bus_event {
extern struct kobject *acpi_kobj;
extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);
extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32);
extern int register_acpi_notifier(struct notifier_block *);
extern int unregister_acpi_notifier(struct notifier_block *);
/*
* External Functions
*/